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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_001_014_2486">&nbsp;</a>NAME</h4><blockquote>
uname - return system name
</blockquote><h4><a name = "tag_001_014_2487">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

uname <b>[</b>snrvma<b>]</b>
</code>
</pre>
</blockquote><h4><a name = "tag_001_014_2488">&nbsp;</a>DESCRIPTION</h4><blockquote>
By default, the
<i>uname</i>
utility will write the operating system name to standard output.
When options are specified, symbols
representing one or more system characteristics will be
written to the standard output.
The format and contents of the symbols are implementation-dependent.
On systems conforming to the <b>XSH</b> specification, the symbols
written will be those supported by the <b>XSH</b> specification
<i><a href="../xsh/uname.html">uname()</a></i>
function.
</blockquote><h4><a name = "tag_001_014_2489">&nbsp;</a>OPTIONS</h4><blockquote>
The
<i>uname</i>
utility supports the <b>XBD</b> specification, <a href="../xbd/utilconv.html#usg"><b>Utility Syntax Guidelines</b>&nbsp;</a> .
<p>
The following options are supported:
<dl compact>

<dt><b>-a</b>
<dd>Behave as though all of the options
<b>-mnrsv</b>
were specified.

<dt><b>-m</b>
<dd>Write the name of the hardware type on which the
system is running to standard output.

<dt><b>-n</b>
<dd>Write the name of this node within
an implementation-dependent communications network.

<dt><b>-r</b>
<dd>Write the current
release level of the operating system implementation.

<dt><b>-s</b>
<dd>Write the name of the
implementation of the operating system.

<dt><b>-v</b>
<dd>Write the current version
level of this release of the operating system implementation.

</dl>
<p>
If no options are specified, the
<i>uname</i>
utility will write the operating system name, as if the
<b>-s</b>
option had been specified.
</blockquote><h4><a name = "tag_001_014_2490">&nbsp;</a>OPERANDS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_001_014_2491">&nbsp;</a>STDIN</h4><blockquote>
Not used.
</blockquote><h4><a name = "tag_001_014_2492">&nbsp;</a>INPUT FILES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_001_014_2493">&nbsp;</a>ENVIRONMENT VARIABLES</h4><blockquote>
The following environment variables affect the execution of
<i>uname</i>:
<dl compact>

<dt><i>LANG</i><dd>Provide a default value for the internationalisation variables
that are unset or null.
If
<i>LANG</i>
is unset or null, the corresponding value from the
implementation-dependent default locale will be used.
If any of the internationalisation variables contains an invalid setting, the
utility will behave as if none of the variables had been defined.

<dt><i>LC_ALL</i><dd>
If set to a non-empty string value,
override the values of all the other internationalisation variables.

<dt><i>LC_CTYPE</i><dd>
Determine the
locale for the interpretation of sequences of bytes of text data as
characters (for example, single- as opposed to multi-byte characters
in arguments).


<dt><i>LC_MESSAGES</i><dd>
Determine the locale that should be used to affect
the format and contents of diagnostic
messages written to standard error.

<dt><i>NLSPATH</i><dd>
Determine the location of message catalogues
for the processing of
<i>LC_MESSAGES .
</i>
</dl>
</blockquote><h4><a name = "tag_001_014_2494">&nbsp;</a>ASYNCHRONOUS EVENTS</h4><blockquote>
Default.
</blockquote><h4><a name = "tag_001_014_2495">&nbsp;</a>STDOUT</h4><blockquote>
By default, the output will be a single line of the following form:
<p><code>
<tt>"%s\n"</tt>, &lt;<i>sysname</i>&gt;
</code>
<p>
If the
<b>-a</b>
option is specified,
the output will be a single line of the following form:
<p><code>
<pre>
<tt>"%s %s %s %s %s\n"</tt>, &lt;<i>sysname</i>&gt;,
&lt;<i>nodename</i>&gt;,
&lt;<i>release</i>&gt;,
&lt;<i>version</i>&gt;,
&lt;<i>machine</i>&gt;
</pre>
</code>
<p>
Additional implementation-dependent symbols may be written;
all such symbols will be written at
the end of the line of output before the
newline character.
<p>
If options are specified to select
different combinations of the symbols,
only those symbols will be written,
in the order shown above for the
<b>-a</b>
option.
If a symbol is not selected for writing, its corresponding trailing
blank characters
also will not be written.
</blockquote><h4><a name = "tag_001_014_2496">&nbsp;</a>STDERR</h4><blockquote>
Used only for diagnostic messages.
</blockquote><h4><a name = "tag_001_014_2497">&nbsp;</a>OUTPUT FILES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_001_014_2498">&nbsp;</a>EXTENDED DESCRIPTION</h4><blockquote>
None.
</blockquote><h4><a name = "tag_001_014_2499">&nbsp;</a>EXIT STATUS</h4><blockquote>
The following exit values are returned:
<dl compact>

<dt>0<dd>The requested information was successfully written.

<dt>&gt;0<dd>An error occurred.

</dl>
</blockquote><h4><a name = "tag_001_014_2500">&nbsp;</a>CONSEQUENCES OF ERRORS</h4><blockquote>
Default.
</blockquote><h4><a name = "tag_001_014_2501">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
Note that any of the symbols could include embedded
space characters,
which may affect parsing algorithms
if multiple options are selected for output.
<p>
The node name is typically a name that the system uses
to identify itself for intersystem communication addressing.
</blockquote><h4><a name = "tag_001_014_2502">&nbsp;</a>EXAMPLES</h4><blockquote>
The following command:
<pre>
<code>
uname -sr
</code>
</pre>
writes the operating system name and release level, separated by one
or more
blank characters.
</blockquote><h4><a name = "tag_001_014_2503">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_001_014_2504">&nbsp;</a>SEE ALSO</h4><blockquote>
The <b>XSH</b> specification description of
<i><a href="../xsh/uname.html">uname()</a></i>.
</blockquote><hr size=2 noshade>
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Copyright &copy; 1997 The Open Group
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